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diff --git a/src/engine/MidiTriggerNode.h b/src/engine/MidiTriggerNode.h
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+/* This file is part of Om.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Om is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ * 
+ * Om is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#ifndef MIDITRIGGERNODE_H
+#define MIDITRIGGERNODE_H
+
+#include <string>
+#include "InternalNode.h"
+
+using std::string;
+
+namespace Om {
+
+class MidiMessage;
+template <typename T> class InputPort;
+template <typename T> class OutputPort;
+
+
+/** MIDI trigger input node.
+ *
+ * Just has a gate,  for drums etc.  A control port is used to select
+ * which note number is responded to.
+ *
+ * Note that this node is always monophonic, the poly parameter is ignored.
+ * (Should that change?)
+ *
+ * \ingroup engine
+ */
+class MidiTriggerNode : public InternalNode
+{
+public:
+	MidiTriggerNode(const string& path, size_t poly, Patch* parent, samplerate srate, size_t buffer_size);
+
+	void run(size_t nframes);
+	
+	void note_on(uchar note_num, uchar velocity, samplecount offset);
+	void note_off(uchar note_num, samplecount offset);
+
+private:
+	InputPort<MidiMessage>* m_midi_in_port;
+	InputPort<sample>*      m_note_port;
+	OutputPort<sample>*     m_gate_port;
+	OutputPort<sample>*     m_trig_port;
+	OutputPort<sample>*     m_vel_port;
+};
+
+
+} // namespace Om
+
+#endif // MIDITRIGGERNODE_H